Indeed, using RadScheduler is a very easy process and there are few good tutorials.
Please, take a look at this blog post for a simple example (link here).
As for the product itself, soon we will have calendars as one of the many small tasks we have planned. I am also working on a free marketplace item, that you can easily plug and use into Sitefinity. Currently is 80% ready and yes, it is based on Rad Scheduler.
All the best,
the Telerik team
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